Hooked CO₂ table back up to the chiller lines. Had to use new tubing as the old ones wouldn't reach the pipe anymore. Took the opportunity to look at contamination in the laser cooling lines, Pictures attached. The wipes were inserted into the elbows and run around, you can see what looks like corrosion deposits that rubbed off, as well as some plastic or metal chips. I then blew some air through the chiller lines of the laser, which moved through apparently unencumbered so that was a good sign. I'm not sure why that larger contamination wouldn't be caught by the sock filters on the chillers, it may be there isn't enough flow velocity to move them out of the nooks and crannies. If there was this much in the larger lines I can definitely see why the smaller lines like the AOM were having problems with contamination then.